Soil compaction tester



FIG. 1 is a top and left front perspective view of a soil compaction tester showing my new design;

FIG. 2 is a left side elevational view thereof, the right side being a mirror image thereto;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof on an enlarged scale. 

The ornamental design for a soil compaction tester, as substantially shown and described. 